Window and door alarm.



.No. 847,525. PATENTED MAR. 19, 1907.

J. SWAN. WINDOW AND DOOR ALARM.-

APPLIOAT-ION FILED D150. 6 1906- WITNESSES I l'NVi/V2'Ofi I z w g za 1ATTORNEY run NORRIS PETERS.C O-, WASHINGTON, 0. c4

JAMES SWAN, OF SEYMOUR, CONNECTICUT.

WINDOW AND DOOR ALARM.

Specification of Letters Patent.

Patented March 19, 1907.

Application filed December 6, 1906. Serial No. 346,631.

To all whom, it may/concern.-

Be it known that I, JAMES SWAN, a citizen of the United States, residingat Seymour, county of New Haven, State of Connecticut, have invented anew and useful Window and Door Alarm, (Case A,) of which the followingis a specification.

This invention has for its object to provide a simple and inexpensiveportable bellalarm that may be conveniently applied to the window of asleeping or other apartment to give and alarm should the window beraised. My Patent No. 798,638, dated September 5, 1905, was for an alarmof this character adapted for attachment to the shank of a door-knob togive an alarm should the knob be turned. My present invention providesan improvement upon my said former invention that will adapt it for usein connection with a window as well as a door.

With these ends in view I have devised the simple and novel portablealarm of which the-following description, in connection with theaccompanying drawing, is a specification, reference characters beingused to indicat the several parts.

Figure 1 is a View illustrating the invention in use as a Window-alarm;Fig. 2, an edge view of the alarm detached, the cord being removed fromthe operating-arm; and Fig. 3 is a detail view showing the position ofthe operating-arm, clamp, and slide when the bell is ringing.

My novel alarm comprises, essentially, the door-alarm of my said formerpatent with the addition thereto of an operating-arm and a cord or itsequivalent for connecting the operating-arm to a window.

10 denotes the bell, which may be an ordinary bicycle or call bell ofany of the types in ordinary use and which is provided with an actuatingmember, in the present instance a push-pin, (indicated by 11.) As it issimply required for the purposes of the present invention that the bellbe provided with an actuating member, I have omitted all illustration ofthe mechainsm of the bell. In practice I have used and have foundadmirably adapted for the purpose required a bell in which the ringingoperation is performed by a spring normally locked against action andreleased to ring the bell by movement of the actuating member. Any otherstyle of bell, however, may be used, if preferred. The bell is carriedby a standard 12,

the construction of which is wholly immaterial so far as the presentinvention is concerned.

13 denotes a clamp which is pivoted to the standard, as at 14. Thisclamp is adapted to attach the standard to a door-knob. The upper end ofthe clamp is provided with an angular face 17, which engages acorresponding face upon a slide 18, which is secured to the standard soas to move longitudinally thereon. In the present instance I have shownthe slide as provided with slots 19 and as secured to the standard bymeans of screws 20 passing through the slots. The slide is made justlong enough so that one end closely engages the actuating member of thebell, in the present instance the head of the push-pin, and the angularface at the other end closely engages angular face 17 at the end of theclamp.

21 denotes an operating-arm which is rigidly secured to the clamp. Theoperatingarm extends from its point of attachment toward the bell, lyingsubstantially parallel with the standard and slide, and is shown asprovided at the end toward the bell with an eye 22. A cord 23is rovided,one end of which is attached to t e operating-arm, as by means of theeye, the other end being adapted for attachment in any suitable mannerto a window-sash, which is indicated by 24. It is of course whollyimmaterial how the cord is attached to the window. It may, for example,be attached to a sash-fastener thereon. In the present instance I haveshown the cord as provided with a screw-eye 25, which may be turned intothe sash as a means of attachment.

In use the window may be closed or partly raised, as preferred. Thealarm is laid upon the floor or elsewhere, as most convenient under ornear the window, the cord connecting the alarm with the window beingmade just taut. When the window is raised, the operating-arm is ofcourse raised thereby; but the weight of the bell will cause thestandard and bell to drop downward. In other words, the standard andclamp will oscillate relatively to each other. This oscillation throughthe engagement of the angular face at the outer end of the slide withangular face 17 on the clamp will move the slide forward and press theactuating member of the bell inward.

The operation will be obvious from Fig. 3. When the operating member israised, the weight of the bell will hold it downward and the swinging ofthe clamp will cause the angular face thereof to engage thecorresponding face of the slide and move the latter toward the bell,which movement of the slide will force the actuating member inward andcause the bell to ring. If a spring-bell is used, the bell will ofcourse continue to ring until the spring runs down or until the windowis moved downward again sufficiently to relieve the tension on the cordand permit the clamp and slide to resume their normal positionthat is,pass from the position shown in Fig. 3 to the position shown in Fig. 1.

Having thus described my invention, I claim 1. A portable window anddoor alarm comprising a bell having an actuating member, astandard bywhich the bell is carried, a slide upon the standard which engages theactuating member, a clamp pivoted to the standard and abutting theslide, an operatingarm extending from the clamp and a cord connected tothe operating-arm, the clamp, slide and arm being so connected that apull on the cord will cause the weight of the device to actuate theslide by the clamp.

2. A portable window and door alarm comprising a bell having anactuating mem her, a standard by which the bell is carried, a clamppivoted to the standard and adapted for attachment to a knob-shank, anoperating-arm secured to the clamp and extending toward the bell, a cordconnected to said arm. and adapted for attachment to a windowsash, and aslide upon the standard which engages the actuating member and theclamp, the contiguous ends of said clamp and slide being provided withangular engaging faces so that the slide will be moved and the bell rungwhen the standard and clamp are oscillated relatively to each other, theclamp, slide and arm being so connected that a pull on the cord willcause the weight of the'device to actuate the slide by the clamp.

In testimony whereof I a'lliX my signature in presence of two witnesses.

JAMES SWAN.

WVitnesses:

A. M. VVoos'rER, S. W. ATnERroN.

